[PATCH 4 of 4] copies: only calculate 'addedinm[12]' sets once

[Durham Goode]

On 2/27/15, 2:46 PM, "Martin von Zweigbergk" <martinvonz at google.com> wrote:

># HG changeset patch
># User Martin von Zweigbergk <martinvonz at google.com>
># Date 1425075982 28800
>#      Fri Feb 27 14:26:22 2015 -0800
># Node ID ec60e0d4a6a938c62b1ffe5f8e5d1ece6da2b145
># Parent  b3bcf58446fdebf3672edbbc55c24509e549eb22
>copies: only calculate 'addedinm[12]' sets once
>
>Pass the addedinm1 and addedinm2 instead of m1, m2, ma into
>_computenonoverlap() instead of calculating the sets twice.

This series LGTM.